NDLI: High performance & low latency in solid-state drives through redundancy

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High performance & low latency in solid-state drives through redundancy

Content Provider	ACM Digital Library
Author	Skourtis, Dimitris Achlioptas, Dimitris Maltzahn, Carlos Brandt, Scott
Abstract	Solid-state drives are becoming increasingly popular in enterprise storage systems, playing the role of large caches and permanent storage. Although SSDs provide faster random access than hard-drives, their performance under read/write workloads is highly variable often exceeding that of hard-drives (e.g., taking 100ms for a single read). Many systems with mixed workloads have low latency requirements, or require predictable performance and guarantees. In such cases, the performance variance of SSDs becomes a problem for both predictability and raw performance. In this paper, we propose a design based on redundancy, which provides high performance and low latency for reads under read/write workloads by physically separating reads from writes. More specifically, reads achieve read-only performance while writes perform at least as good as before. We evaluate our design using micro-benchmarks and real traces, illustrating the performance benefits of read/write separation in solid-state drives.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISBN	9781450324625
DOI	10.1145/2527792.2527798
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-11-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Storage virtualization Qos Performance Solid-state drives
Content Type	Text
Resource Type	Article

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